1399389558 has 64 divisors (see below), whose sum is σ = 3383316480. Its totient is φ = 376941600.

The previous prime is 1399389557. The next prime is 1399389559. The reversal of 1399389558 is 8559839931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1399389557) and next prime (1399389559).

It is a super-2 number, since 2×1399389558² = 3916582270078870728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399389557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164223 + ... + 172533.

It is an arithmetic number, because the mean of its divisors is an integer number (52864320).

Almost surely, 2^1399389558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399389558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691658240).

1399389558 is an abundant number, since it is smaller than the sum of its proper divisors (1983926922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399389558 is a wasteful number, since it uses less digits than its factorization.

1399389558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8553.

The product of its digits is 10497600, while the sum is 60.

The square root of 1399389558 is about 37408.4156039787. The cubic root of 1399389558 is about 1118.5263244639.

The spelling of 1399389558 in words is "one billion, three hundred ninety-nine million, three hundred eighty-nine thousand, five hundred fifty-eight".